clarence marvin



C. MARVIN.

EXCAVATOR.

APPLHJATION FILED AUG.I. r911.

Patented Aug". 19, 1919.

JIZPQIV z I wit M coo end of the @lLAE-JENCE MVm, 0F MATHEE, 'WISEONSIE.

EXGAVATOE.

Specification of Eetters Eatent.

Patented ne is, rare Application filed August 1, 191?. Serial no.183,921.

To all whom it may concern."

Be it known that I, CLARENCE Mauvin, a citizen of the United States,residin at Mather, in the county of Juneau and tate of Wisconsin, haveinvented a new and useful Excavator, of which the following is aspecification.

The present invention appertains to encavatons and the object of theinvention is the provision of novel means for mounting and operating thedipper.

1n the drawings, the invention is disclosed in a single verticalsection, parts being broken away, and parts appearing in elevation.

lhe main frame 1 is of any desired construction, and is supported asshown I at 2. Carried by the forward portion of the main frame 1 is aturn table 5, an inclined mast 6 having its lower end secured to theturn table. The turn table 5 and the mast 6 are pivoted, as at 7 to theforward portion of the frame 1 to swing about a vertical vaxis. AU-shaped stirrup 8 is secured to the upper mast 6 and its terminalsare,connected b rods 9 with an anchor plate 10 nuts 11 being threadedupon the rods an bearing against the late. The plate 1s pivoted, as at12, to t e upstanding forward portion 13 of the frame 1, the pivots 7and 12 being in vertical alinement, whereby the rods 9 and the mast 6may swing laterally. Guys 13' connect the frame portion 13 with thelower rear part of the frame 1.

As a means for turnin' the turntable 5 to swing the mast 6 latera ly,the table has an arcuate flange 14 around which a cable 15 extends, saidcable being secured intermediate its ends to the table, and theterminals of the cable 15 being wound in 0 pcsite' directions upon adrum 16 carrie by the frame 1, whereby when the drum is rotated inopposite directions, the mast 6 will be swung laterally in oppositedirections.

The mast 6 is slotted as shown in 75, and a boom 17 extends through theslot. An oscillatory guide 18 is trunnioned or pivoted, as at boom 17extends through the guide, rollers 20 being carried by the ide, betweenwhich rollers the boom exten s. As the boom 17' is swung upwardly anddown -"rdly, the guide 18' can escalate with it, and the rollers 20permit the boom to slide backwardly and forwardly.

,AS a means for advancing the boom 17, a

19, within the mast 6 and the cable 21 is attached at one end, as at 22,to

the mast 6 above the boom, and is looped over a pulley 23 carried by therear end of the boom. From the pulley '23, the cable 21 is looped arounda pulley 2 1 carried by the mast 6 below the boom, and from the pulley-24, the a pulley block 25 hung from the forward portion 13 of theframe 1. lhe other terminal of the cable 21 is wound upon a drum 26carried by the frame 1, whereb when the drum is operated to windthe cale thereon, the looped portion of the cable 21 between the anchored end22 and the pulley 24: will be drawn forwardly to move the pulley 23 andthe boom 17 likewise. When the drum 26 is released, to enable the cable21 to unwind therefrom, the boom 17 can be moved rearwardly as willhereinafter appear.

The rearward movement of the boom 17 is accomplished by a cable 27having one end anchored to the boom, as at 29, near the forward end ofthe boom, and said cable 27 extends between guide pulleys 28 carried%the mast 6 near the lower end thereof.

cable 21 extends over the sheave of e cable 27 extends from the pulley28 I through the pulley block 25 and thence to a drum 30 carried by theframe 1 upon which drum said cable 27 is wound to pull the boom 17rearwardly, the drum 30 being released when the drum 26 is operated towind the cable 21 thereon. The drums 26 and 30 are thus operatedalternately for moving the boom forwardly and rearwardly during theoperation of the excavator.

A dipper 31 has its bottom pivoted or hinged, as at 32, to the forwardend of the boom 17 and when in receiving position, is

swung upwardly, being held in this position by means of a keeper 33attachedte the dipper and engaging a spring pressed latch stem atmounted on the boom 17. This construetion will hold the dipper 31 inreceiving pesition until released, and the forward portion of the dipperbeing heavier than the rear portion thereof, will cause the dipper totilt and dump as seen in the drawing, when the dipper is released. l ver35 is fulcrumed upon the boom 17 and is pivoted to the latch 3 1 toretract the latch and release the dipper. A release cable 36 isconnected to the lever 35 and looped around a pulley 37 carried by theforward end of the boom 17. This cable 36 can be readily pulled forswinging the lever 35 retract the latch '34, whereby the dipper W111tilt and dump.

sides of the dipper adjacent to (thebottomthereof, and a cable 40 isused for raising said boom and dipper, one end of the cable beinganchored, as at 41-, to the upper free end of the mast 6. The cable 40is looped through a pulley block 42 connected to .the bail 39, and fromthe pulley block 42, the cable 40 passes over a pulley 43 carried b themast 6 near the upper end thereo From the pulley 42, the cable 40extends over a pulley block 44 hung .from the pivot member 12. From thepulley 44, the cable 40 extends to and is wound upon a drum 45 carriedby the frame, whereby when the cable 40 is wound upon the drum, thedipper 31 and the boom 17 will be raised.

When the dipper 31 is in receiving position and latched, the mast 6 canbe swung to the desired position by operating the drum 16. Then, byoperating the drum 26 to pull the cable 21, the boom 17 will be forcedforwardly and swing the forward end thereof and dipper 31 upwardly, toscoop the dirt or material into the dipper during its forward and upwardmovement. The cable 40 is wound upon the drum 45 to assist in raisingthe dipper. Then, when the dipper is raised, it can be moved to one sideor the other by swinging the mast 6 in the desired direction, and theboom 17 can be retracted by winding the cable 27 on the drum 30. To dumpthe dipper, it is necessary merely to pull the cable 36, which willdisengage the latch 34 from the dipper and permit the dipper to dump.

If desired, the excavator may be propelled by stepper 47 and anoperating means '5574 therefor.

.on the mast to the rear of the guide; an

outer idler on the forward end of the mast;

' a bucket pivoted to the forward end of the boom; a sheave assembledwith the bucket; means releasable from a remote point for holding thebucket against tilting on the boom; a first flexible element having itsends connected to the mast in advance of the guide and to the firstdrum, the intermediate ortion of the flexible element being formed intooppositely projecting loops engaged, respectively, with the inner idleron the mast and with the idler on the boom; a second flexible elementhaving its ends connected to the second drum and to the forward end ofthe boom; and a third flexible element having its ends connected to thethird drum and to the forward end of the mast, the third flexibleelement passing over the outer idler on the mast and comprising a loopreceiving the sheave which is assembled with the bucket.

In testimony that I claim the foregoing as my own, I have hereto affixedmy signature in the presence of two witnesses.

CLARENCE MARVIN.

Witnesses:

GEO. A. MARVIN, 'B. R. MITCHELL.

